Tuyere



(No Model.)

B. MOG'RODER.

TUY-ERE. H No. 396,102. Patented Jan. 15, 1889.

Ting 1) \A/ITN E5 5 as,

N PETERS. FhnluLllh dgnuM Washington a c UNITED STATES PATENT OFFICE.

BERNARD MCGRODER, OF CLEVELAND, OHIO.

T UYERE.

SPECIFICATION forming part of Letters Patent N 0. 396,102, dated January 15, 1889. Application filed October 17, 1888. Serial No. 288,330- (N'o model.)

To all whom it may concern.-

Be it kn own that I, BERNARD MCGRODER, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain Improved Double-Valve-Bottom Blast Tuyere- Iron, of which the following is a specification.

The object of the improvements is to render the tuyere-iron more powerful and durable, and to be readily freed from ashes or cinders IO which may accumulate within the chamber of the tuyere iron; to provide means by which a circulation of air is induced through the fire as may be required when the blast is not applied, and in making the tuyere-iron with a I 5 hollow tuyere valve and stem, both for lightness and to cause a current of air to pass through the said valve to prevent its burning out.

That the invention may be fully understood,

reference will be had to the following specification and annexed drawings.

Figure 1 illustrates a vertical section of the said tnyere-iron. Fig. 2 is an inverted plan view thereof, and Fig. represents a front side view.

Like letters designate like parts in the drawings and specification.

The air-chamber A provided with a base or flange, a, (which may be either square or round,) by which means it is set and held in position in connection with the forge. The interior is preferably of a parobola form or parabolic curve, with corresponding exterior. Near the bottom of the air-chamber A is an open- 3 5 ing, 1), Fig. 1, which is the terminus of the induction blast-pipe F, and at the crown or top of said chamber is the air outlet or opening 0. Said opening 0 is controlled by the air-valve B. The upper part of this valve coincides with the walls of the air-chamber and is pointed to protrude through the opening 0 when so set by means of the lever E. Said opening or outlet is then closed. The lever E has a jointed connection, (Z, with the lower end of the valve-stem B, as shown in Fig. 1. The pivotal connection or fulcrum of the lever E is formed by means of the hinges G, which are suspended by a joint from the lugs e (seen in Fig. 2) on the lower side of the base a. In

the bottom of said air-chamber is an opening, f, which is covered by the valve 0. This valve is 011 and guided by the valve-stem B and lever D, and is operated by the lever D also, which lever is pivotally connected with the lugs e at h by the same jointed connection which forms the hinge G. The free end of the lever E is set or arranged in the notches of the corrugated spring-guides I when the valve C is adjusted to close the opening f. This opening is used as an outlet for the discharge of cinders or ashes which may drop into the airchamber from the fire above through the opening 0.

At intervals, when the fire is lowering-that is, when the blast is retarded, owing to the accumulation of cinders in the air-chamber then the lever D is disengaged from the notch of the bar H, Fig. 1, and the lever E raised toward the lever D, as indicated by the dotted line g, which movements admit of the valves B 0 being moved from their seats. As the valve 0 is moved from its seat and the valve B lowered from its seat, one is enabled to free the air-chamber and the fire from cinders and ashes through the openings 0 and f, in order to induce a free blast and active fire for use. 011 closing the valve 0 then the valve B can be set according to the amount of blast required. By means of the corrugated springguide Lsecured to the lever D, the lever E may be set and retained in. the notches or catches of said guide and held in position with relation to the valve B, according to the volume or draft of air required for. the fire. The said guide I consists of spring-loops, through which 8 5 the lever vibrates, the projections i, Fig. 3, on the inside of the guide between the loops restraining the passage of the lever E to such an extent that force is required to swing the lever up or down, so that the lever is held in the 0 position required. It is thus that the blast passing through the opening 0 is under the de scribed controllable devices and directed to the fire. On lowering the valve B slightly from its seat, only a small current of air is given to the fire, whereas, when required, the valve can be so opened as to use the full force of the blast.

It is essential to the effectiveness of said tuyere-iron that the air-chamber A and valve B be so proportioned in relation to each other as to allow of a free and open passage of air from the chamber through the opening r to the fire. The valve 1) and its stem are pre iera bly made hollow, as seen in Fig. 1, to admit a current of air through the stem and valve, by means of which the said parts are held (:001 and of light weight for operation.

In the apex of the valve 13 are one or more holes, j, for the eduetion of airfrom its induction 70 at the lower end of the stem. This passage of air through the valve and stem is induced by the strrjmg air-cairrent flowing through the openin e atthe crown of the chamber A. ()n lowering or opening the valve 15, the force of air passingthrough said valveopenin 0, being in con tact with the lire, causes a suction upon the holes j, thereby inducing a partial vacuum in the ehambtal of the valve ll, which vacuum is etmstantly supplied with exterior air through the tubular stem 13 of the valve B; hence the induction of air through the stem and valve is (-onstantwith its eduction through. the holes], Figs. 1 and 23.

it it is required to keep the eoalignited ai ter the blast is shut off from the air-chamber, then the level-1) disengaged from the notch in the bar H and the valve (1 moved down to induce a current of air through opening f in the bottom of the air-chamber, which will sustain ordinarily enough fire until the usual airblast is again set in action.

'What I claim, and desire to secure by Letters Patent, is

1. A tuvere-iron ('(HlSlStlllg of the valves i; C and levers l) and E, in combination with the airehamber ('(mstrueted as described, with the said valve l; adapted to the chamber and the opening (1 in the erown thereof, of the valve 0 having a seat in the base of said chamber and sliding upon the tulmlar stem of the valve B, arranged substzultially as set forth, for the purpose d eseribml.

L). 'In combination with the lovers l) E, hollow valve ll, having a tulmlar stem, and valve (7, of the air-chamber, arranged as shown in relation to said 'alve l3, of the guide I, seeured to the lever l) and inclosing the lever E, with projections '1' at the inside thereof, forming stops to arrest and hold said lever E at divers points within the guide, as set forth.

3. In a tuyere-iron, the combination oi. the air-chamber, a hollow valve, 1- with a tubular stem, and having one or more air-passages in the apex of: said valve, of. the valve C, surroundingthe tubular stem, and the lovers 1) E, arranged in conjoint and operative relation with said valves, in the manner and for the purpose sulmiantiallv as set forth.

in test imonv whereotl allix. my signature in presence of two Witnesses.

I-EERNARI') MLGRO'DER.

W i tnesses:

\V. H. BUnm'omc, 1%. F. Ennians. 

